Abstract: A method and device for managing retransmit operations. The device, includes a FIFO memory unit, a read pointer, a retry pointer and a write pointer. The device is characterized by including a gray code state machine connected to an emulated read pointer logic; whereas the gray code state machine is adapted to provide a gray code word representative of a state of a read logic that comprises the read pointer; whereas the emulated read pointer logic is adapted to process at least one gray code word and to provide an emulated read pointer that tracks a FIFO memory unit entry that stores data that was not accepted; whereas the emulated read pointer logic is connected to a write control logic adapted to control writing operations to the FIFO memory unit in response to the emulated read pointer logic; and whereas the read logic receives a read clock that differs from a write clock provided to the emulated read pointer logic and to the write control logic.

Abstract: A method and a device for exchanging data. The method includes: requesting the processor, by the data transfer controller, to initiate a transfer of multiple data chunks from the second memory unit to the Virtual FIFO data structure, in response to a status of the virtual FIFO data structure; sending the data transfer controller, by the processor a request acknowledgment and an indication about a size of a group of data chunks to be transferred to the virtual FIFO data structure; updating the state of the virtual FIFO data structure; transferring, by the second level DMA controller, the group of data chunks from the second memory unit to the virtual FIFO data structure; sending, by the processor a DMA completion acknowledgment indicating that the group of data chunks was written to the virtual FIFO data structure; and transferring, by a first level DMA controller, a data chunk from the virtual FIFO data structure to the hardware FIFO memory unit.

Abstract: A method and device for managing retransmit operations. The device, includes a FIFO memory unit, a read pointer, a retry pointer and a write pointer. The device is characterized by including a gray code stat e machine connected to an emulated read pointer logic; whereas the gray code state machine is adapted to provide a gray code word representative of a state of a read logic that comprises the read pointer; whereas the emulated read pointer logic is adapted to process at least one gray code word and to provide an emulated read pointer that tracks a FIFO memory unit entry that stores data that was not accepted; whereas the emulated read pointer logic is connected to a write control logic adapted to control writing operations to the FIFO memory unit in response to the emulated read pointer logic; and whereas the read logic receives a read clock that differs from a write clock provided to the emulated read pointer logic and to the write control logic.